394594609 has 4 divisors (see below), whose sum is σ = 395349616. Its totient is φ = 393839604.

The previous prime is 394594591. The next prime is 394594621. The reversal of 394594609 is 906495493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 906495493 = 491 ⋅1846223.

It is a cyclic number.

It is not a de Polignac number, because 394594609 - 2¹³ = 394586417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394592609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376719 + ... + 377764.

It is an arithmetic number, because the mean of its divisors is an integer number (98837404).

Almost surely, 2^394594609 is an apocalyptic number.

It is an amenable number.

394594609 is a deficient number, since it is larger than the sum of its proper divisors (755007).

394594609 is an equidigital number, since it uses as much as digits as its factorization.

394594609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755006.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The square root of 394594609 is about 19864.4055788236. The cubic root of 394594609 is about 733.4722978844.

The spelling of 394594609 in words is "three hundred ninety-four million, five hundred ninety-four thousand, six hundred nine".